Listen! Do you hear the little girl the violin in the next room? It sounds beautiful.
A. is playing
B. play
C. to play
D. playing
网友回答
A. is playing
B. play
C. to play
(答案→)D. playing
解析：根据前文Listen!，听！可知本句描述的是正在进行的动作，根据Do you hear可知句子不缺少谓语动词，故选D，现在分词作宾语补足语表示正在进行的伴随性动作。